EP2464264B1 - Induction cookware item with circulating air film - Google Patents

Induction cookware item with circulating air film Download PDF

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Publication number
EP2464264B1
EP2464264B1 EP09809061.6A EP09809061A EP2464264B1 EP 2464264 B1 EP2464264 B1 EP 2464264B1 EP 09809061 A EP09809061 A EP 09809061A EP 2464264 B1 EP2464264 B1 EP 2464264B1
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Prior art keywords
cookware
cooking
pot
spacer
air
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EP09809061.6A
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German (de)
French (fr)
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EP2464264A2 (en
Inventor
Kolja Kuse
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated

Definitions

  • the present invention relates to an inductive cookware in which it is ensured by an air film between the cooking vessel and cooking stove plate that the hob is heated or heated as little as possible.
  • the material of the cookware is magnetizable at least at the bottom.
  • the air film is created by a distance between the underside of the cooking vessel and the cooking plate.
  • the magnetizable underside of the bottom of the pot is rotated by an induction field, which by means of a coil below the cooking surface, through which flows a higher frequency alternating current is generated above the hob surface, in molecular vibration of the magnetic dipoles and thereby heated.
  • the invention therefore proposes to automatically provide any inductive cookware by its geometry on the ground at a distance from the cooking plate, which allows a free automatic Heilkonvetation, which means for each type of inductive cooking only advantage because Temperturedutation on Hochherdober Design.
  • the experiments in connection with this development have shown that the air film in any cooking situation and geometry of the cooking vessels would have produced any technical problems, handling problems or energy transmission problems that would make it necessary to make such spacers removable.
  • the knowledge thus made clears the way for inductive cookware generally a permanently and fully integrated distance between cooking vessel and Herober Construction provide as it brings no disadvantages.
  • the recess on the bottom of the pot has a certain length and two-dimensional curve shape with airfoil profile for the flow acceleration.
  • the support surface on the stove plate should itself form the smallest possible area, which is why a three-dimensional curve shape, for example, that of a spherical surface, is selected.
  • One of the many possible embodiments of the invention describes a hearth plate made of granite (1), which is supported by an induction coil (2) which heats a magnetizable cooking vessel (3). On this hotplate is a cooking vessel (3) is used, which has three spacers (4) for Herauflage. The resulting layer of air between the underside of the bottom of the pot and the upper side of the hob ensures that the hot air is removed by natural convection of the warm air and the automatic flow of cold air.
  • Fig. 2 shows the section through the shape of a pot bottom (1) having a hollow groove (2), in which a plastic-containing material (3) is pressed, which fills the space of the groove so that it can not fall out and held by the geometry becomes.
  • the material has a temperature stability up to over 400 ° C and consists of thermoplastic polybenzimidazole plastic (PBI).
  • Fig. 3 shows a hearth plate of granite (1), which is supported by an induction coil (2) which heats a magnetizable cooking vessel.
  • a cooking vessel (3) is used, which has three spacers (4) for Herauflage, the survey is carried out crescent-shaped downwards.
  • the air circling under the pot, cold air (5) flows on two sides of the three asymmetrically arranged sickles, which are designed as wing profile with hydrofoil effect, and on the third side, the heated air (6) flows out again the stove surface is increasingly cooled.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)

Description

Die vorliegende Erfindung bezieht sich auf ein induktives Kochgeschirr, bei welchem durch einen Luftfilm zwischen Kochgefäss und Kochherdplatte dafür gesorgt wird, dass das Kochfeld möglichst wenig erwärmt bzw. erhitzt wird. Das Material des Kochgeschirrs ist mindestans an der Unterseite magnetisierbar.The present invention relates to an inductive cookware in which it is ensured by an air film between the cooking vessel and cooking stove plate that the hob is heated or heated as little as possible. The material of the cookware is magnetizable at least at the bottom.

Der Luftfilm wird durch einen Abstand zwischen Unterseite des Kochgefässes und der Kochplatte erzeugt.The air film is created by a distance between the underside of the cooking vessel and the cooking plate.

Die magnetisierbare Unterseite des Topfbodens wird durch ein Induktionsfeld, welches mit Hilfe einer Spule unterhalb der Kochfeldoberfläche, durch die ein höherfrequenter Wechselstrom fliesst, oberhalb der Kochfeldoberfläche erzeugt wird, in molekulare Schwingung der magnetischen Dipole versetzt und dadurch erhitzt.The magnetizable underside of the bottom of the pot is rotated by an induction field, which by means of a coil below the cooking surface, through which flows a higher frequency alternating current is generated above the hob surface, in molecular vibration of the magnetic dipoles and thereby heated.

Bei dieser Erwärmung mit Hilfe der induktiven Energieaufnahme wird das ganze Kochgefäß mit Inhalt heiss und erwärmt gleichzeitig die Unterlage, auf der das Kochgeschirr steht, was in der Regel eine Ceranplatte oder ähnliche Keramikfläche oder Steinauflage ist, die die Herauflagefläche bildet, auf der die zu erhitzenden Koch- und Bratgefässe stehen.In this warming with the help of inductive energy absorption, the whole cooking vessel with content is hot and heated at the same time the pad on which the cookware, which is usually a Ceranplatte or similar ceramic surface or stone support, which forms the Aufauflagefläche on which to be heated Cooking and frying vessels stand.

Um diese Fläche möglichst wenig aufzuwärmen empfiehlt der Stand der Technik zum Beispiel in der DE 297 03 237 einen aufsetzbaren Abstand zwischen Kochgefäss und Herdauflage zu bringen, der seinerseits einen Luftfilm zwischen Kochgefäss und Herdplatte zulässt. Diese Luft erwärmt sich an der Unterseite des Kochgefässes und fliesst nach aussen und oben ab, wobei die erwärmte Luft Wärme abführt, die andernfalls ohne Luftfilm die Herdplatte erwärmen würde. Diese Luftschicht kann auf der Herdoberfläche bereits einen Temperaturunterschied von mehreren 10°C, je nach Luftschichtdicke bis zu 50°C, bewirken und fuhrt zu einer Reduktion der Herdtemperatur, die dadurch in einen Bereich kommt, innerhalb dessen man sich nicht mehr ernsthaft verbrennen kann, selbst wenn man mit der Hand auf die Kochfläche fasst, auf der gerade zuvor gekocht wurde.To warm up this surface as little as possible recommends the state of the art, for example, in the DE 297 03 237 to bring an attachable distance between the cooking vessel and hearth, which in turn allows an air film between cooking vessel and hotplate. This air heats up at the bottom of the cooking vessel and flows outwards and upwards, with the heated air dissipating heat that would otherwise heat up the stove top without air film. This layer of air can already have a temperature difference of several 10 ° C on the hearth surface, Depending on the air layer thickness up to 50 ° C, causes and leads to a reduction in the stove temperature, which comes in an area where you can not burn more seriously, even if you hold your hand on the cooking surface on the just before was cooked.

Bekannt sind also bewegliche Abstandhalter, die unter den Topf gestellt oder gelegt werden, oder durch Magnet an den Topfboden angebracht sind, die einen Abstand zwischen Topf und Herdplatte bringen, um Kühlung durch Luftzirkulation zu erreichen. Diese haben den Vorteil univerell einsetzbar zu sein und jeden induktiv beheizten Topf, der auf dem Markt ohne die Vorrichtung des Abstandes im freien Handel erhältlich ist, mit dem Vorteil des Abstandes zu versehen. Solche Lösungen haben sich aber bisher deshalb nicht durchgestzt, weil als zu unpraktisch erwiesen, da diese Abstandhalter geometrisch kompliziert sind, als zusätzliches Teil gespült und verstaut werden müssen, und nicht jede Geometrie optimal auf jeden Topf passt. Lose Abstandhalter durch Kleb-Verbindung am Topfboden anzubringen, siehe DE-A-3602666 , ist ebenso unpraktisch, da Klebeverbindungen sich bei diesen Temperaturen über die Zeit lösen.So known are movable spacers that are placed or placed under the pot, or are attached by magnet to the bottom of the pot, bringing a distance between the pot and stove plate to achieve cooling by air circulation. These have the advantage of being universally applicable and to provide each inductively heated pot, which is available in the market without the device of the distance in free trade, with the advantage of the distance. So far, however, solutions of this kind have not been found to be too impractical, since these spacers are geometrically complicated, have to be rinsed and stowed as an additional part, and not every geometry optimally fits every pot. Loose spacers to be attached to the bottom of the pot by adhesive bonding, see DE-A-3602666 , is also impractical because adhesive bonds dissolve over time at these temperatures.

Die Erfindung schlägt deshalb vor, nunmehr jegliches induktive Kochgeschirr durch dessen Geometrie am Boden automatisch mit einem Abstand zur Kochplatte zu versehen, der eine freie automatische Luftkonvektion zulässt, die für jede Art des induktiven Kochens nur von Vorteil wegen Temperturreduktion an der Hochherdoberfläche bedeutet. Die Versuche im Zusammenhang mit dieser Entwicklung haben gezeigt, dass der Luftfilm in keiner Kochsituation und bei keiner Geometrie der Kochgefässe irgedwelche technischen Probleme, Handling-Probleme oder Energeiübertragungsprobleme erzeugt hätte, die es notwendig machen würden, solche Abstandhalter abnehmbar zu gestalten. Die damit gemachte Erkenntnis macht den Weg frei für induktives Kochgeschirr generell einen permanent und voll integrierte Abstand zwischen Kochgefäss und Heroberfläche vorzusehen, da er keine Nachteile mit sich bringt.The invention therefore proposes to automatically provide any inductive cookware by its geometry on the ground at a distance from the cooking plate, which allows a free automatic Luftkonvektion, which means for each type of inductive cooking only advantage because Tempertureduktion on Hochherdoberfläche. The experiments in connection with this development have shown that the air film in any cooking situation and geometry of the cooking vessels would have produced any technical problems, handling problems or energy transmission problems that would make it necessary to make such spacers removable. The knowledge thus made clears the way for inductive cookware generally a permanently and fully integrated distance between cooking vessel and Heroberfläche provide as it brings no disadvantages.

Die Lösung der Erfindung ist im unabhängigen Anspruch 1 gegeben. Demgemäß wird ein anderes Material auf solche Weise fest in den Boden eingepasst und eingelassen sein, dass es mechanisch fest und unlösbar mit Hilfe geeigneter Geometrien von Boden und Abstandhalter, zum Beispiel in Form einer Hohlkehle im Topfboden, in die ein Abstandhalter aus Teflon oder Polybenzimidazol-Kunststoff (PBI) eingeklinkt und somit fest und dauerhaft verbunden ist. Entscheidend ist, dass dieser Kunststoff Temperaturen bis mindestens 400°C aushalten können muss, da er sonst die Funktion nicht dauerhaft erfüllen kann, wenn er sich verformen und lösen kann. Ein zusätzlicher Effekt wird dann erzeilt, wenn sich durch die Form der Vertiefung an der Unterseitee des Topfes die natürliche Luft-Zirkulation in Form einer Rotation der ein und ausströmenden Luft ausbildet. Dies kann erreicht werden, wenn die Vertiefung an der Topfunterseite eine gewisse Länge und zweidimensionale Kurvenform mit Tragflächenprofil für die Strömungsbeschleunigung hat. Die Auflagefläche auf der Herdplatte sollte selbst eine möglichst kleine Fläche bilden, weshalb eine dreidimensionale Kurvenform, zum Beispiel die einer Kugeloberfläche, gewählt wird.The solution of the invention is given in independent claim 1. Accordingly, another material is to be firmly fitted into the ground and embedded in such a way as to be mechanically strong and unsolvable by means of suitable geometries of soil and spacers, for example in the form of a groove in the bottom of the pot into which a Teflon or polybenzimidazole spacer may be inserted. Plastic (PBI) is latched and thus firmly and permanently connected. It is crucial that this plastic must be able to withstand temperatures of at least 400 ° C, otherwise it can not fulfill the function permanently if it can deform and loosen. An additional effect is achieved when the shape of the depression on the underside of the pot forms the natural air circulation in the form of a rotation of the incoming and outgoing air. This can be achieved if the recess on the bottom of the pot has a certain length and two-dimensional curve shape with airfoil profile for the flow acceleration. The support surface on the stove plate should itself form the smallest possible area, which is why a three-dimensional curve shape, for example, that of a spherical surface, is selected.

Eine der vielen möglichen Ausführungen der Erfindung beschreibt eine Herd-Platte aus Granit (1), die mit einer Induktionsspule (2) unterbaut ist, die ein magnetisierbares Kochgefäss (3) erhitzt. Auf diese Kochplatte kommt ein Kochgefäss (3) zum Einsatz, welches drei Abstandhalter (4) zur Herauflage hat. Die dadurch geschaffene Luftschicht zwischen Topfbodenunterseite und Herdplattenoberseite sorgt für den Abtransport der heiss werdenden Luft durch natürliche Konvektion der warmen Luft und dem automatischen Nachfliessen kalter Luft.One of the many possible embodiments of the invention describes a hearth plate made of granite (1), which is supported by an induction coil (2) which heats a magnetizable cooking vessel (3). On this hotplate is a cooking vessel (3) is used, which has three spacers (4) for Herauflage. The resulting layer of air between the underside of the bottom of the pot and the upper side of the hob ensures that the hot air is removed by natural convection of the warm air and the automatic flow of cold air.

Abb. 2 zeigt den Schnitt durch die Form eines Topfbodens (1), der eine hohlkehlförmige Vertiefung (2) hat, in die ein kunststoffhaltiges Material (3) eingepresst ist, welches den Raum der Hohlkehle so füllt, dass es nicht herausfallen kann und durch die Geometrie festgehalten wird. Das Material hat eine Temperaturstabilität bis über 400°C und besteht aus thermoplastischem Polybenzimidazol-Kunststoff (PBI). Fig. 2 shows the section through the shape of a pot bottom (1) having a hollow groove (2), in which a plastic-containing material (3) is pressed, which fills the space of the groove so that it can not fall out and held by the geometry becomes. The material has a temperature stability up to over 400 ° C and consists of thermoplastic polybenzimidazole plastic (PBI).

Abb. 3 zeigt eine Herd-Platte aus Granit (1), die mit einer Induktionsspule (2) unterbaut ist, die ein magnetisierbares Kochgefäss erhitzt. Auf dieser Kochplatte kommt ein Kochgefäss (3) zum Einsatz, welches drei Abstandhalter (4) zur Herauflage hat, dessen Erhebung nach unten sichelförmig ausgeführt ist. Die Luft kreist dabei unter dem Topf, kalte Luft (5) strömt an zwei Seiten der drei unsymmetrisch angeordneten Sicheln, die als Tragflächenprofil mit Tragflächen-Strömungseffekt ausgeführt sind, ein und an der dritten Seite strömt die erwärmte Luft (6) wieder aus, wodurch die Herdoberfläche verstärkt gekühlt wird. Fig. 3 shows a hearth plate of granite (1), which is supported by an induction coil (2) which heats a magnetizable cooking vessel. On this hotplate, a cooking vessel (3) is used, which has three spacers (4) for Herauflage, the survey is carried out crescent-shaped downwards. The air circling under the pot, cold air (5) flows on two sides of the three asymmetrically arranged sickles, which are designed as wing profile with hydrofoil effect, and on the third side, the heated air (6) flows out again the stove surface is increasingly cooled.

Claims (2)

  1. Arrangement with a cookware (3), e.g. with a cooking vessel, a frying pan, a griddle plate or other geometry, which is suitable for cooking, roasting or keeping warm and preparing food, which consists of a magnetisable material and which has a spacer to the cooktop, wherein the number of 3 spacers is selected,
    characterized in that a recess in the cookware tray is carried out so that another material which is softer than the material of the cookware tray and plastically deformable within limits, in this way is firmly embedded or pressed into the recess, so that the other Material is mechanically firmly fixed with the cookware underside by interlocking geometry, for example in the form of a fillet in the bottom of the pot, thus forming the distance to the cooktop, wherein the spacer consists of a up to 400°C temperature-resistant PBI plastic material.
  2. Arrangement according to claim 1, characterized in that the shape of the spacer has a two or three-dimensional waveform.
EP09809061.6A 2008-11-16 2009-12-23 Induction cookware item with circulating air film Active EP2464264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202008015175U DE202008015175U1 (en) 2008-11-16 2008-11-16 Induction dishes with circulating air film
PCT/EP2009/009258 WO2010072414A2 (en) 2008-11-16 2009-12-23 Induction cookware item with circulating air film

Publications (2)

Publication Number Publication Date
EP2464264A2 EP2464264A2 (en) 2012-06-20
EP2464264B1 true EP2464264B1 (en) 2019-06-19

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EP (1) EP2464264B1 (en)
DE (1) DE202008015175U1 (en)
ES (1) ES2765598T3 (en)
WO (1) WO2010072414A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009014437U1 (en) * 2009-10-26 2010-03-25 Kuse, Kolja Mobile tapanyaki plate
FR2952289B1 (en) * 2009-11-06 2012-02-24 Pillivuyt CERAMIC COOKING USTENSILE
GB2492121A (en) * 2011-06-22 2012-12-26 Christopher Lawson Induction Cookware with polymeric contact surface
ES2402960B1 (en) * 2013-01-08 2014-03-13 Juan Lloveras Calvo Induction cooking system and container necessary for said system
IT201700108580A1 (en) * 2017-09-28 2019-03-28 Latini Elio E C Sas SYSTEM FOR SUPPORTING CONTAINERS ON COOKTOPS WITH INDUCTION HEATING
DE202017005821U1 (en) * 2017-11-09 2018-02-01 Erhard Tönsing Spacer between pot and hob
FR3113361A1 (en) * 2020-08-11 2022-02-18 Patrick Herbault Plate for induction hob

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004023043A1 (en) * 2002-09-09 2004-03-18 Lino Cavicchioli Cooker grid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657699A1 (en) * 1976-12-20 1978-06-22 Bosch Siemens Hausgeraete Cooking utensil for inductive cooking - has base pref. of metal with coating possessing low permeability
DE3602666A1 (en) 1986-01-29 1987-07-30 Wmf Wuerttemberg Metallwaren Appliance for cooking food
FR2686035B1 (en) * 1992-01-10 1995-08-18 Seb Sa ARTICLE MADE FROM A METAL PLATE, PARTICULARLY A COOKING CONTAINER.
DE29703237U1 (en) 1997-02-24 1997-05-15 Kuse Kolja Induction cooker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004023043A1 (en) * 2002-09-09 2004-03-18 Lino Cavicchioli Cooker grid

Also Published As

Publication number Publication date
WO2010072414A2 (en) 2010-07-01
WO2010072414A3 (en) 2010-08-19
DE202008015175U1 (en) 2009-03-12
ES2765598T3 (en) 2020-06-09
EP2464264A2 (en) 2012-06-20

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